#include <iostream>
#include <iomanip>
#include <stack>
#include <queue>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <deque>
#include <set>
#include <map>
#include <bitset>
#include <atcoder/all>
#define rep(i,n) for(int i = 0; i < n; i++)

using namespace std;
using namespace atcoder;
using ll = long long;

int main() {
	int n;
	cin >> n;

	vector<int> x(n), y(n);

	for (int i = 0; i < n; i++) {
		cin >> x[i] >> y[i];
	}

	ll ans = 1000000009;
	for (int i = 1; i <= 300; i++) {
		ll tmp = 0;
		for (int j = 0; j < n; j++) {
			tmp += abs(i - x[j]) + abs(i - y[j]);
		}
		ans = min(ans, tmp);
	}

	cout << ans << endl;
}